Wire brushing

Clean the surface with a wire brush to loosen the oxide film and then wipe it off with a soft cloth. The use of a wire brush serves a dual purpose first, scraping and removing the oxide film, and secondly, providing the surface with a moderate knurling (roughness), which helps to make a better surface-to-surface contact and, in turn, a better joint. 

Inspect the reservoir interior for rust and other deposits. Remove any rust with scrapers and wire brushes, wash down the interior with a detergent solution, and flush with clean water. Dry the interior by blowing the surfaces with dry air and use a vacuum cleaner to remove trapped liquids. 

The typical decontamination may include removing any gross contamination in the exclusion zone using equipment that will stay in the EZ (for instance, a hand scraper, a wire brush, etc.). Once gross contamination is removed, the worker (or equipment) might go to the decon pad where washing with a scrub brush, soap, and water might take place. Chapter 10 provides an in-depth discussion of decontamination and work zones. 

Before placing a machine on its base, make sure that both the base and the bottom of the machine are clean, rust free, and do not have any burrs. Use a wire brush or file on these areas if necessary. 

Wire-brush, 3 coats of paint (two on site) 23-9 Brushdown, spot prime, 2 top coats —4 year intervals 20-2 124-9... 

Air-drying alkyds may also be used for the production of primers and undercoats. In the case of primers, the shorter the oil length of the binder the faster the drying, but the lower the tolerance for wire-brushed rusted-steel surfaces. Alkyd-based undercoats are not significantly different in performance from those based on oil varnishes the choice is frequently dictated by economic considerations. 

Red lead, zinc chromate, calcium plumbate and zinc dust were for many years of special importance as pigments for metal primers. When dispersed in raw or lightly-treated linseed oil, the first three possess the ability to inhibit the corrosion of mild steel and will function very well on wire-brushed rusted surfaces. In other media the tolerance towards rusted surfaces decreases with decreasing quantities of available oil, but performance on clean steel will usually be maintained and often improved. 

In this method an oxyacetylene or oxypropane flame is passed across the steel. The sudden heating causes millscale and other rust scales to flake off as a result of the differential expansion between the scale and the metal. In addition, any rust present is dehydrated. Immediately after the passage of the flame, any loose millscale and rust that remains is removed by wire brushing. This generally leaves a powdery layer which must also be removed by dusting down. 

Advance warning should be had from the plant running log of any build-up of scale on water-cooled surfaces. Scale within the tubes of a straight double-pipe or shell-and-tube condenser can be mechanically removed with suitable wire brushes or high-pressure water lances, once the end covers have been removed. Tubes which cannot be dealt with in this way must be chemically cleaned (see also Chapter 33). 

These units can vary from simple wire brushes rotating at high speed to carborundum belts. Heat generation in the rubber product is the main problem with these units. 

Mechanical surface preparation shall be performed by wire brushing, grinding, buffing, and polishing when required, to remove harmful defects such as fissures, pits, gouges, folds, laps, or oxides. 

Steel should be prepared by using a caustic solution and by scraping, wire brushing, or grit blasting. 

Test samples have been prepared from a 3 mm hot-rolled steel sheet which showed an intact mill scale (Degree A of Swedish Standards, SIS-055900), Thereafter they were shot blasted with S-280 to reach the ASa3 standard, prior to the application of the paint coating. Surface preparation B St 2 was obtained by wire brushing a steel sheet of Grade B obtained in turn by oxidation of Grade A sheet in a contaminant free atmosphere. In "Table I.", the characteristics of the paints used in this study are shown. 

Grime which cannot be eliminated by washing can be removed mechanically using a wire brush, metallic scrubber or scraper. 

Cleaning by hand tools is the oldest process. Today this is employed only when power tools are not available and where the surface is inaccessible to power tools and too small. The generally used hand tools are wire brush, scraper blades and chipping hammer and emery or sand paper. Hand held electric or pneumatic power tools for cleaning include sanders, pneumatic scalers, needle gun and rotary steel brushes. 

External parts such as the valve body, bonnet and cap should be cleaned by immersion in a bath such as hot Oakite solution or equivalent. These external parts may be cleaned by wire brushing, provided the brushes do not damage or contaminate the base metals. Only clean stainless steel brushes should be used on stainless steel components. For the ultimate best results, these parts could also be pickled and passivated. 

Scratching (removing loose rust with a wire brush or fine steel wool). 

Abrasion. Sanding, wire brushing, or 100-grit emery... 

Brick and fired nonglazed building materials Methyl ethyl ketone Abrade surface with a wire brush remove all dust and contaminants. ... 

For clean out of the extruder at shutdown, disassemble the crosshead and clean it while still hot. Remove the die, and gear pump if used, and remove as much plastic as possible by scraping with a copper spatula or brushing with a copper wire brush. Remove all heaters, thermocouples, pressure transducers, and so on. Consider using an exhaust duct system above the disassembly and cleaning area, even if the plastic is not a contaminating type. This procedure keeps the area clean and safe. 

Follow by pushing the screw out gradually while cleaning with a copper wire brush and copper wool.93 Care should be exercised if a torch is used to burn and remove plastic tempered steel may be altered and the screw distorted or weakened as well as subjected to excessive wear, corrosion, or even failure (broken). 

Procedures for the preparation of bone samples for isotopic analyses are critical for obtaining reliable data Archaeological bone for analysis is first thoroughly washed and wire-brushed to... 

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